Sickle- driver attachment for mowing-machines



(No Model.)

J. WALKER & H. T. OAULK.

SIGKLE DRIVER ATTACHMENT FOR MOWINGMAOHINES. A No. 384,828. PatentedJan.26, 1886.

" fl l llllll l i flllllllllllllllIIIIIml" he returns ATENT i 1 JAMESWALKER AND HENRY T. GAULK, OF IANTHA, MISSOURI.

SlCKLE-DRIVER ATTACHMENT FOR MOWING MACHINES.

SPECIFICATION forming part of Letters Patent No. 33%,828, dated January26, 1886.

Application filed October 17, 1885. Serial No. 180,195. (No model.)

To all whom it may concern:

Be it known that we, JAMES WVALKER and HENRY T. CAULK, citizens of theUnited States, residing at Iantha, in the county of Barton and State ofMissouri, have invented a new and useful Improvement in Sickle- DriverAttachments for Mowing-Machines, of

which the following is a specification, reference being had to theaccompanying drawings.

This invention is an improved pitman or cutterbar driver formowing-machines; and it consists in the peculiar construction andcombination of devices, that will be more fully set forth hereinafter,and particularly pointed out in the claims.

In the accompanying drawings, Figure l is a perspective view of parts ofa mowing-machine with our improved pitman attached thereto. Fig. 2 is aside elevation, partly in section, of the pitman.

A represents the crank or driving-wheel of an ordinary mowing-machine.

13 represents the fin ger-bar, and 0 represents the cutter-bar orsickle, that reciprocates on the finger-bar in the usual way; and Drepre sents our improved pitman for connecting the crank-wheel and thecutterbar. This pitma-n has one end bifurcated, as at E, where it isattached to the wrist-pin of the crank-wheel, and in this bifurcated endof the pitman is fitted a gib or block, F, which is provided with alongitudinal vertical slot, G. The bifurcated ends of the pitman havevertical aligned openings H, through which and through the slot G in thegib passes a bolt or key, I, which is provided with a nut, K, on itsthreaded end. The other extremity of the pitman is curved downwardly, asat L, to form a segment of a circle on its under side; and the underside of the pitman, near the downturned extremity, is provided with aseries of ratchetteeth, M.

N represents a movable block or gib,which is provided on its upper sidewith a series of ratchet-teeth, O, that engage with the teeth M of thepitman, and has also a vertical longitudinal slot, P. An opening, R, ismadein the pitman, above the teeth M, and a bolt, S, passes through saidopening and through the slot P of the gib O, to secure the latter to thepitman.

T represents a metallic block or bracket, which is screwed or bolted totheinner end of the cutter-bar, and is provided with a circular eye, U.This eye fits between the downturned end L of the pitman and the gib N.A bolt,V, passes transversely through an opening in the center of theeye, and on the ends of this bolt are fastened washers TV, that bear onopposite sides of the end of the pitman and the gib N, to preventlateral vibration or movement of the parts of the joint.

It will be seen that by providing a cutterbar with anupwardly-projecting eye,which is secured on the under outer end of thepitman, the latter exerts a constantly downward pressure on thecutter-bar as it reciprocates,

thus keeping the cutter-bar at all times hear ing firmly on the upperside of the finger-bar, and thus strain on the cutter-bar is preventedand no tendency is exerted to cause the cutter-bar to rise above thefinger-bar, as is the case when the end of the pitman is connecteddirectly to the end of the cutterbar in the usual way.

The gibs F and N are both movable in the same direction at both ends ofthe pitinan, to take up the wear, and thus thelatter is maintainedconstantly of the samelcngth. \Vhere only one gib is employed,thedistance between the center of the wrist-pin and the center of thesickleeye is either increased or decreased slightly as the gib is movedto take up the wear, and the pitman is thereby strained or compressedlongitudinally, causing it to break or bend, and making much additionalfriction on the bearings.

We do not desire to limit ourselves to the construction describedherein, as it is evident that many modifications may be made thereinwithout departing from the spirit of our invention.

Having thus described our invention, we claim- 1. The combination of theeye, the pitman having the downturned end and the ratchetteeth, the gibN, having the ratchet-teeth engaging with the teeth of the pitman, saidgib bearing against the eye to secure the latter between it and thedownturned end of the pitman, the bolt or key S, to secure the gib N tothe pitman,and the gib F, in the other end of the pitman, the gibs N andF being movable In testimony that we claim the foregoing as in the samedirection, substantially as deour own we have hereto affixed oursignascribed. tures in presence of two witnesses.

2. The combination of the eye, the pitman 5 having the downturned endand the ratchet- JAMES WALKER.

teeth, and the gib having the ratchet-teeth en- HENRY T. GAULK.

gaging with the teeth of the pitnian, said gib bearing against the eyeto secure the latter Witnesses: between it and the downturned end of thepit- JOHN E. BROOK, 10 man, and the bolt or key to secure the gib toURBIN E. QUIREY.

the pitman, substantially as described.

